Let me spoil this movie for all here. It was human’s last stand and the apes gave a dolly to the captain which had smallpox like ailment, except it rendered the humans to be stupid and dumb. Then the last vast human army was about to attack the apes and they were all killed in an random avalanche. The apes lived happily ever after with their new improved mind-altered human. The movie sucked.
In the original film, the ape dictatorship was able to survive by systematically restricting the public’s access to historical facts that contradicted the ape supremacist rhetoric.
They called it the Forbidden Zone.
They lobotimized a human who could talk because it challenged their ‘scientific’ worldview.
I don’t think that Rod Searling was so simplistic as to suggest Man bad, Ape good.